Noesion Radarnoesion.ai
Market2026-07-31

Leopold Aschenbrenner's AI-focused hedge fund Situational Awareness, which had managed roughly $45 billion, was forced into a sweeping reduction of its listed-stock positions after a momentum reversal hit both legs of its portfolio and prime brokers issued margin calls. The fund was long AI infrastructure names — filings as of March 31 showed stakes in Nebius, Bloom Energy, Sandisk, CoreWeave, SharonAI and IREN, shares that had fallen 50% to 78% from recent peaks — while short software firms such as Adobe, which rallied. Morgan Stanley's sector-neutral Momentum Index fell 17.4% in four trading days, which BTIG's Jonathan Krinsky called the fastest momentum crash in modern history. Citadel agreed to buy the fund's publicly traded assets; AI infrastructure stocks rebounded on Thursday, though Michael Burry added bearish positions in Micron, SOXX and Nvidia puts.

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